Loans Receivable and Related Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Classes of the loan portfolio
Classes of the loan portfolio	$ 176,244	$ 187,665
Performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	174,832	185,175
Non-performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	1,412	2,490
Residential loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	112,014	118,468
Residential loans [Member] | Performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	110,947	116,704
Residential loans [Member] | Non-performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	1,067	1,764
Home equity loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	61,758	66,687
Home equity loans [Member] | Performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	61,422	65,961
Home equity loans [Member] | Non-performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	336	726
Consumer loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	2,472	2,510
Consumer loans [Member] | Performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	2,463	2,510
Consumer loans [Member] | Non-performing loans [Member]
Classes of the loan portfolio
Classes of the loan portfolio	$ 9